Question

tính bằng cách thuận tiện nhất

15/34-5/17+19/34-12/17

Answer 1

\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)

\(=\left(\frac{15}{34}+\frac{19}{34}\right)-\left(\frac{5}{17}+\frac{12}{17}\right)\)

\(=1-1=0\)

Answer 2

\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)

\(=\left(\frac{15}{34}+\frac{19}{34}\right)-\left(\frac{5}{17}+\frac{12}{17}\right)\)

\(=\frac{34}{34}-\frac{17}{17}\)

\(=1-1\)

\(=0\)

Answer 3

\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)

=\(\frac{15}{34}+\frac{19}{34}-\frac{5}{17}-\frac{12}{17}\)

=\(1-\frac{5}{17}-\frac{12}{17}\)

=\(1-\left(\frac{5}{17}+\frac{12}{17}\right)\)

=\(1-1\)

=\(0\)